Pressure-regulator for gas systems.



F. L. CROSS. PRESSURE REGULATOR FOR GAS SYSTEMS.

IN VEN TOR TTORNE YS Patented July 4, 1916 2 SHEETS-SHEET '1 APPLICATION FILED FEB. 6 1909.

A 7 02 a %%Wwm F. L. CROSS. PRESSURE REGULATOR FOR GAS SYSTEMS.

APPLICATION FILED FEB. 6, I909.

Patented July 4, 1916.

2 SHEETS-SHEET 24 INVEN TOR WITNESSES:

A TTORNE YS PATENT m QR/ANK p. cno ss F DETROIT, MICHI AN.

1 ism-349 This invention rMatcs to a pressure regulike .fpr autoniaticall y maintaining the deal 1wcssui7e in a conduit or gas main; 7 he inicntion ronsists in the linatters e 'eiuaftei" forth and more particularly 'poiuu-d out in the. appended claims.

llefrrriug l-u tl'iedrawiugs; Figure l'is a i- =mmmu view. of an apparatus.ein-

a suuilarricu' showing one modification of -r p n utatus.- l.

"rulicatediinthe'drawiug a supply main aids-intoa regulating;'xalvO CaSing 2 t -;i|i x-h:u'gcs in'to trictedoutlctof thc main'l into 'tlufleas tau-(- controlled l'| suitahle closures 5, I (-ra'hly conical; on an'u'pright stem 6 so disposed thatupx'vanl IIIOVC-ll'lfillt oft-he stein closes the passage tlu'ouglr the valve to a" {or .or less extent. The stem extends throughxa suitahle packing gland Tor like.

hearing. in theTasiu-g top and a drum 8 $5 thereon. movable diaphragm" 9 thatdi- Nides the drum inn upper and lowerthen-latter. An a 'ierture in the upper part lfl of tludrum is closed by a flexible dia phragnrll secured to the stem 6 of considerably l(' \\":lI-(':l than that of-the main diapIu-agin 9 \vhcreh v' the total effective pres sure area of the upper face-of the main diaphragm in the upper chamber is leRS than the efl'ective pressure area of the under face of. the' diaphragnn A bonnet l2 mavhe added to protect the auxiliary diaphragm 11 and asuitahle couuterhalance, such as a weight-:13. cord l-land puller 15,

b0 i: |rovidcd 'for the stem 6.

there is a control valve with a casing 16 :div-idcd hrn (raills-verse wall 17 into tivo l cumparimerits. cham'la-r 18 in this wall is in communication with the upper and lower (:nH|[);:IlIIl('I'll$ respectively through alincd valve 501115 19 and is connected by an lying features .f=.the inventiong Fi-g'. 2' is' Service mai'n' 3. Y ed;zq'iei'tured valve- Seats 4' that form a? spcifica rioii of Letters Patent.

A p plication'filed Februar a, 1303. Serial No. 476,338.

lhe folh'uving is a specification, reference hcmg had therein to the accompanying 10 d ran ings.

llor {Mingus distributing system. or the PRESSURE-REGULATOR FOR GAS SYSTEMS.

Patented July 4., 1910."

inlet pipe-20 with the main 1. A priir of closi'u-es 29 carried by a stem '22 are so dis -posed that raising the stern closes the lower Seat and lou' 'ering it seals theupper seat.

.\ pair of flexible (liaphragms 23 each havlug respectively the-same effective area as.

the adjacent seat a perturera're connected to the stem J! in order to produce balanced action in the valve. valve 15 divided by a diapl'iragrn 25 into a lower compartment that is open to the air and an upper closed compartment that is in conunuuication with the service main 3 through :rpipe 26. A spring)? or other suilahle means is attached to the stem 22 in surll manner as to tend tolift it, the tension.

of thi-spring being adjusted to lllCQtlilllfiqiureuicuts of service in operation.

' The pipe 20 is in communication with the upper chamber of the'drumB-thrbugh the A. dun er Quins upper scat- 19 in 'the varve'casing 1Q nndfa j.

pipe 50 while thelower seat 1'9 ofithe easing lll' foruis communication through iapipe 30f between the pipe 20 and thelower chamber of-thellrunr p a \s a' result of thisconstruction he; nil-- huring operation results if. tlieutensi'on of the main .1

the cuutr0llillg spriugQ'? is such {that the, lqxver valve seat 19 ES Ql OSQd, and-the upper open when thc'halance ll) pressure-on the sides of the diaphragm holds the valve otherwise inert. Initial pressure set ,up .,in

enters the Upper ch arnherof the regulating valve through, the. pipe; 50, and tcnds'to open the latter valve hy holding flit-diaphragm Qdovvn Thisis permitted h providing a restrietedvent opening-32 \Yllll'll may he to atmosphere'o'r maybe into the main 3 through asuitable connection 37. \Yhcn the flow of; gaslrcsulting Ifr-ommthe depression of the closures -fi builds up a pressure in the main ,3 which is greater 'tl'iiin desired, a back pressure through the pipe 26 on the upper part of the diaphragm of the controlling valve depresses the closures thereof so that the upper valve closure seat 19 15 either restricted or-"complctcly cut oil and the companion lower 'clo sure 19 more freely opened. This sets up a (ma-expending closing pressure/in the lower drum compartment of the regulating valve and draws the closures 5 toward their respcrtive seats. thereby restricting the flow. If the pipe 50 is closed completely through the seating of the companion seat 19, the contents of the upper compartment of the i area.

drum is permitted toslowly'escape through a restricted opening 32 which may be either open to atmosplmre or to the main 3 through a pipe .Id. The outlets retard. the esmpe snlliciently so that the pressure in the chalnlusrs 1S somewhere between that In.

'\vard tendency in the diaphragm 9 which causes a restriction in the controlling valve and this restriction results ina drop in pressure between the mains 1 and 3; Itfor any reason, as for example, sudden check in the consumption of gas from the main 3, the back pressure through the pipe 26 closes the valve 16 to .the pipe :70 and therelly.

throws the pressure against the lower side of the diaphragm Land further restricts the passage through the regulating valve. Thus the difference-in pressure hetween the two mains during the movement of gas from one to the other is held substantially (-,onstant.

If for any"reason' the main regulating valve should drop and stick when there is no movement of gas in the"mainsthe apparatus might network .when'thegas resumes flow and consequentexcessive pressure in the service main 'would follow; To avoid 7 this a safety valve 33 connected hya pipe 34.. to the upper compartment of the main drum 8, the other endof the pipe 34 open- ,-ingto atmosphere. A stem 35 that operates this safety valve'extends into-a drum or shell 37 divided'by amovahlediaphragm 36 which is adapted to raiseor lower the stem, a spring 38 normally holding the stem up and the valve 33 closed. A pressure pipe 39 connects the upper closed compartment-of the drum 3 1' with the mainfi. Any pressure above the normal in the latter depresses the diaphragm 37 and opens the safety valve 33,j thus giving unrestricted eommunicationjhetween the air in the upper eompartmentiot'thedrum 8 so that'the gas beneath the-diaphragm 9 of the latter drum exerts a greater lifting force on'theclosure 5 and shuts the regulating valve oil. This therefore insures the main or -regulating valve) from remaining lopen Ally proper regulation or adjustnuart of the weight 13 the point ia't which the regulating valve should open is. readily determined. The samerontnol of, mains may he ell'ected by a disposition of the parts shown in Fig- 2m which thescontrolling valve responds direetlyQtO rirfssure in thexnain 3. In such instances an inlet pipe 40 opens from the main 3 mto the valve casing ehamher, the lower compartment of the-easing being connected to' the. lower compartment of the regulating valve drum 8 by a pipe 42 andf the .upper compartment lay a pipe 41. The same delicacy of action is obtained as in the other construction lay venting the drum compartments of the control valve by re stlieted openings 45 and 46' to air.

lly eithe method of construction an apparatus is obtained whieh holdsthe pres sure of a service main in substantially con-- stant relation to the pressure of a supply mam regardless of the varlatli'msof service at the outlet end of the service. main;

' (-)ln:ionsl y, changes in the detailsol com struetlon may he made Without departing from the spirit of my invention and I do not care to limit myself to any particular form or arrangement of parts.

What I claim-is: I

l The comhination in a gas systenu ol a supply main, a service main, a fluid pressure 'o u-rati-d valve for regulating the How hetweelr the mains; alluid pressure operated k-ontrolling -\'alve adaptedto govern the regulating valve and itself controlled lpy the pressure in. the service'lnain. anda safety valve adapted to |nde u-mlentlyarelieve the pressure ol" lluul operating the regulating valve to close the latter -when'.a -pre(I(-.ter-, mined pressure IS reached rm f-the: service mam. u

2. Thecoinhination in, a gussyshzm, of a.

supply main,'a valveregnhating-the llovv from-tlu': supplyto tl1e.serviewnia-in; means for operating the valve hy pn ssure ot flhiid in the supply main, a valve:forl'admitting lluid from the supply main-to the 'regulab ing valve operating imeaus m'eai'ls l'orioperating the latter valve by I'HCSQIIH', ol'. lluid in the service/main, the regulatingivalve lieing arranged togaulolnatically maintain a difference in pressurebetween the supply and service-mains, and a safety valve. op-. erated by pressure in the service main and adapted to relieve lluid'pressure. in vthe .operating means of the regulating valve to close the lat tenwluan the pressure in the service main rmuzhes a [)l(',(l(.l4'.l'lfllfl('.(l point.

ihjlhe combination in a gas system, f a

main, a regulating valve the.r( in means for operating the valve adapted to he actuated hy. gasjunder static n'essure m the mam to :;lose as the pressure rises a controlling valve, means for operating the controlling valve .adapted lo he actualed lay gas under static pressure in the main on the outlet side of tluregulating valve; the eontrollingvalve and operating means of the; regulating valve eoacting to operate the regulating valve either in conjunction with orin opposition to the slatie pressure and a safety valve adapted when the static pressure in the out let arm of the main approaches a predetermined point to augment the effective closing pressure.

4. The combination in a gas system, of a main, a regulating valve thereinhaving a drum and a movable main diaphragm therein for operating the valve partially balanced on one side by an opposing diaphragm and arranged to close the valve when the static pressure in the main is above a predetermined point, a controlling valve having one outlet in communication with the drum on one side of the main diaphragm and a second outlet in communication with the drum on the opposite side of the diaphragm, and an inlet in communication with the main, means actuated by gas in the main on the outlet side of the main for moving the controlling valve, and a safety valve operated by gas in the outlet arm of the main adapted to open the drum on the balanced side of the diaphragm to atmosphere when the pressure in the outlet of the main reaches a predetermined point.

5. The combination in a gas generating and distributing system, of a conduit, a valve adapted to automatically regulate flow through the conduit, a governor operating under variations in the differences between inlet and outlet pressures in the conduit on either side of the valve to move the valve, and means respondmg to outlet pressures partially and controlling the valve through the governor tohold the outlet pressure in the conduit in a. constant relation to the inlet pressure.

6. The combination in a gas generating and distributing system, of a conduit, a valve adapted to automatically establish a ditlerential pressure in the conduit whenever there is a flow of fluid therethrough, a governor for the valve adapted to be operated by the ditferential pressure thus set up, and means responding to outlet pressures to hold an outlet pressure in the conduit in constant relation to the inlet pressure.

7. In combination in a gas generator and distributing system, of a conduit, a valve adapted to automatically regulate the flow through the conduit, a governor for the valve adapted to be operated by the ditl'en ences in outlet and inlet pressures thus set. up, a valve controlling and directing the ad mission of fluid from the conduit to the governor, and means responding to outlet pressure inithe conduit and controlling the valve to hold'an outlet pressure in the conduit in constant relation to the inlet pressure.

In testimony whereof I allix my signature in presence of two \vitlwsses.

" FRANK L. CROSS.

Witnesses:

C. R. summer, A. M. SHANNON. 

